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qmail migration: handle forwared mails better #555

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qmail migration: handle forwared mails better #555

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17 changes: 8 additions & 9 deletions source/migration/qmail/reports/config-is-catchall.rst
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Expand Up @@ -18,7 +18,7 @@ and mailboxes etc. But it depends very much on how you use these catchall and ot
Workaround to keep "-" delimiter catchall
-----------------------------------------

Assuming that you have a ``.qmail-shops-default`` that you want to migrate.
Assuming that you have a ``.qmail-shop-default``, ``.qmail-shops-default`` ,``.qmail-newsletter-default`` ,``.qmail-newsletters-default`` that you want to migrate.

First you will need to setup a general catchall, therefore you create for example a mailbox named ``catchall-mailbox``:

Expand All @@ -36,17 +36,16 @@ Then you configure the catchall to forward mails to this mailbox:
[isabell@stardust ~]$ uberspace mail catchall set catchall-mailbox
Mails, which cannot be matched to a mailbox, will be sent to catchall-mailbox.

Then on the mailbox ``catchall-mailbox`` you need to configure with Sieve filters, that all mails **except** mails to
``shops-*@`` will be rejected:
Then on the mailbox ``catchall-mailbox`` you need to configure with Sieve filters, that all mails **except** mails to matching the correct Delivered-To Header will be rejected ( Using the ``Delivered-To:`` Header ensures forwarded mails are handled correctly ):

.. code-block::

require ["fileinto", "reject"];
if address :matches "to" "shops-*@*" {
keep;
} else {
reject;
}
require ["fileinto", "reject", "regex"];
if header :regex "Delivered-To" "^[^-]+-(shops?-.+|newsletters?-.+)@.+" {
keep;
} else {
reject "";
}

This example script will keep the mails in the new mailbox, but you can also use ``fileinto`` to store them in specific
folders or forward them to another mailaddress with ``redirect``.